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TitleDeformation cycles of subduction earthquakes in a viscoelastic Earth
AuthorWang, K; Hu, Y; He, J
SourceNature vol. 484, 2012 p. 327-332,
Alt SeriesEarth Sciences Sector, Contribution Series 20110422
Mediapaper; on-line; digital
File formatpdf
AreaSumatra; Cascadia; Chile
Subjectstectonics; geophysics; subduction zones; subduction; crustal movements; crustal studies; crustal evolution; deformation; geodesy; satellite geodesy; mantle
Illustrationscross-sections; location maps; block diagrams; diagrams
ProgramTargeted Hazard Assessments in Western Canada, Public Safety Geoscience
Released2012 04 18
AbstractSubduction zones produce the largest earthquakes. Over the past two decades, space geodesy has revolutionized our view of crustal deformation between consecutive earthquakes. The short time span of modern measurements necessitates comparative studies of subduction zones that are at different stages of the deformation cycle. Piecing together geodetic 'snapshots' from different subduction zones leads to a unifying picture in which the deformation is controlled by both the short-term (years) and long-term (decades and centuries) viscous behaviour of the mantle. Traditional views based on elastic models, such as coseismic deformation being a mirror image of interseismic deformation, are being thoroughly revised.